How To Get The Most Out Of A Tank Of Gas: Tips From The Experts At Consumer Reports

How To Get The Most Out Of A Tank Of Gas: Tips From The Experts At Consumer Reports Consumer Reports has no relationship with advertisers on this site.
By Jeff S. Bartlett/Consumer Reports

Summer travel season is underway, and gas prices are on the rise. Pump prices over Memorial Day weekend were the highest since 2014, and the current national average is $1.05 above this time last year, according to AAA. Now is as good a time as ever to fine-tune your driving strategies and techniques to maximize your fuel economy and ease the squeeze on your wallet.

Consumer Reports experts pulled together the following series of test-proven tips to help drivers save money.

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Fuel-Economy Tips
1. Stay at half: Keep at least a half-tank of fuel at all times while there is a risk of shortages. If gas becomes scarce in your area, having gas in the vehicle will give you options.

2. Check online: Apps and websites such as GasBuddy can show local gas prices, making it easy to find good prices in your area or if you need to travel. Generally, gas stations well off major highways and away from city centers tend to have better prices, as do warehouse stores and some major travel centers.

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3. Minimize travel: If you can delay errands or other activities, you will preserve the gas that you purchased and reduce overall consumption for the region, helping in some small way to reduce the gas scarcity.

4. Obey speed limits: When you drive, follow the speed limits and drive smoothly. Your driving habits can play a significant role in fuel economy.

A recent CR test shows this: We measured gas mileage while driving at a steady 55, 65, and 75 mph in a Nissan Altima and Toyota RAV4. We found that reducing speed from 65 mph to 55 mph improved fuel economy by 6 mpg in the Altima and 8 mpg in the RAV4. The penalty of cruising at 75 mph, rather than 65 mph, was almost 7 mpg in the Altima and 6 mpg in the RAV4. Higher speeds exact a toll in fuel consumption. Another way to look at it: Speeding up from 55 to 75 mph is like moving from a compact car to a large SUV. Beyond fuel concerns, speeding is, of course, a safety risk.

5. Drive evenly: Avoid hard acceleration and braking whenever possible. In our tests, frequent bursts of acceleration and braking reduced an older Toyota Camry’s mileage by 2 to 3 mpg. Once up to speed, maintain a steady pace. The harder you accelerate, the more fuel you use. Unnecessary braking wastes the fuel you used to get up to speed. Drive smoothly and anticipate the movement of traffic. Smooth acceleration, cornering, and braking also extend the life of the engine, transmission, brakes, and tires.

6. Pay attention to aerodynamics: Remove roof racks when they are not being used. At highway speeds, more than 50 percent of engine power goes to overcoming aerodynamic drag. Don’t add to that by carrying unneeded things on the roof. We did fuel-economy tests at highway speed on a Nissan Altima and Toyota RAV4 with a roof rack, a tail-hitch rack, and a rooftop box. Carrying two mountain bikes on the roof had the biggest impact. The Altima lost 13 mpg, going from 46 mpg to 33 mpg. The RAV4 lost 7 mpg, dropping to 32 mpg from 39 mpg.

There’s even a loss when driving with an empty roof rack: The Altima dropped 5 mpg, and the Toyota lost 2 mpg. The Nissan lost 12 mpg with the bikes on the hitch-mounted rack, while the RAV4 was down only 5 mpg. The bikes stuck out beyond the sides of the sedan, which created extra drag. They were mostly hidden behind the wider, boxier RAV4’s bodywork.

The rooftop box resulted in a 9 mpg decrease for the Altima and a 5 mpg drop for the RAV4.
Overall, the aerodynamic drag doesn’t hurt the more boxy RAV4 as much as the sleeker Altima.

7. Don’t be picky on gas: We typically recommend using Top Tier gas — that is, gas that is held to a higher standard through the voluntary participation of numerous gas station brands, including BP, Exxon, and Shell. But there are many familiar brands that do not have Top Tier gas. That said, during a shortage, there is no reason to hesitate to use whatever brand of gas is convenient and competitively priced. The detergents in Top Tier gas can eventually clean any engine deposits that may accumulate when gas is more readily available.

8. Skip the premium: Save money and skip premium gas unless it is “required.” This is indicated on the fuel filler door. Many cars list “recommended,” which means it is optional. If there is only midgrade or premium fuel available, this will work fine in a car that is rated for regular gasoline.

9. Check tire pressure: Check your tire pressure. Tires lose about 1 psi a month. Having tires with lower pressure than what is recommended on your doorjamb sticker can affect performance, tire longevity, and fuel economy.

10. Skip the AC: Using air conditioning does consume gas. In mild weather, if you can get by without it, even if you open the windows, it will give incremental savings. But once it gets hot, having AC on to cool the cabin and lower humidity is a wise investment in your comfort and ability to stay alert while driving.

Consumer Reports is an independent, nonprofit testing and advocacy organization. Since 1936, we have provided unbiased, evidence-based information and advocated to protect the rights and safety of consumers. Sign up for a free CR newsletter to get expert insights delivered to your inbox. This article was originally published by Consumer Reports on May 13, 2021 and was last updated June 2, 2021.